Trolley.



No. 843,373. PATENTED FEB. 5, 1907.

J. STRUTH & C. HOLZAPPEL. TROLLEY.

APPLIOATION FILED JUNE 23. 1906.

rus NonRls PETER: ca., wAsNlNcmN, n. c.

JOHN STRUTH AND CONARD HOLZAPFEL, OF PRIMROSE, PENNSYLVANIA.

TROLLEY.

Specification of Letters Patent.

Patented Feb. 5, 1907.

Application tiled June 231905. Serial No. 323,136.

Be it known that we, JOHN STRUTH and CONARD HoLZArFEL, citizens of theUnited States of America, residing at Primrose, in f the county ofI/Vashington and State of Pennsylvania, have invented certain new anduseful Improvements in Trolleys, of which the T all whom, t may concern:L i

l following is a specification, reference being l l had therein to theaccompanying drawings.

This invention relates to certain new and useful improvements introlley-harp attachments; and the invention has for its primary objectthe provision of novel means in connection with a harp for retaining atrolleyl wheel carried by said harp upon a trolleywire or electricalconductor. l

Another object of this invention is to proi vide means for theabove-mentioned purpose that can be easily and quickly operated topermit of the trolley-wheel being removed from its trolley-wire.

A further object of the invention is to provide a simple and inexpensiveattachment for trolley-harps which will be positive in its action andpossessed of durable properties.

Vith these and other objects in view the invention consists in the novelconstruction, combination, and arrangement of parts to be presentlydescribed in detail and then particularly pointed out in the appendedclaim.

Referring to the drawings accompanying this speciiication, Figure 1 is aside elevation of our improved harp attachment. Fig. 2 is a rearelevation of the same. Fig. 3 is a detail sectional view of a portion ofthe attachment, taken on the line of Fig. 2. Fig. 4 is a horizontalsectional view of a portion of the attachment, taken on the line g/ y ofFig. 2 and Fig. 5 is a detailperspective view of a journal-pin formingpart of the attachment.

In the accompanying drawings we have illustrated a portion of atrolley-pole 1, equipped with a conventional form oi harp 2, such asused in connection with electrically-operated mine-cars. In the harp 2is mounted a pin 3, upon which revolves a trolley-wheel 4, adapted toengage a trolleywire 5.

To put our invention into practice, we provide the base 6 of the harpwith a rearward extension 7, in which our attachment is pivotallymounted. The attachment consists of journal-pin 8, revolubly held inengagement I with the extension 7 by a bearing-plate 9, secured to theunder side of the extension 7. i The ends of the pin 8 are bifurcated,and pivotally mounted in the ends ol said pin are vertieally-disposedarms 10. The upper and lower ends of said arms are bent inwardly, and inthe lower ends ol said arms is loosely mounted a link or ring 11, towhich is secured a trolley-rope. (Not shown.) The upper ends of the armsare provided with inwardlyextending pins 12, upon which are journaledsubstantially cone-shaped rollers, the ends of said rollers engaging oneanother and bridging the trolley-wire 5.

The arms 1() above the extension 7 are connected together by a retractalspring 15, and the l'ront edge of said arms are connected by springs 16to the ends of the pin 3, these springs serving to maintain the arms 10in a vertical position, while spring 15 retains the cone-shaped rollers14 in engagement with one another.

In placing the trolley-wheel 4 upon the wire 5 the ring 11 is pulleddownwardly to separate the upper ends of the arms 1() and allow thewheel 4 to engage said wire.

Then a harp equipped with our improved attachment is in operation, thecone-shaped rollers 14 will prevent the trolley-wheel 4 from beingdisplaced by any irregularity in a trolley-wire, sharp curves,crossovers, or by the rapidity at which the harp moves. Then placing ahanger or trolley-wire support, the arms 10 recede until the hanger ispassed, and then the spring 15 returns said arms to their normalposition.

By reason otl the arms 1() being pivotally mounted on the extension 7 ofthe trolleyharp it will be observed that these arms are permitted toswing rearwardly at their upper ends when the cone-shaped rollers 14come in contact with a switch, hanger, or the like on the trolley-wire5. The conical shape o1 the rollers causes such contact to be made atthe point between the rollers, and the pressure on the same by theobstruction is such as to cause the rollers to spread suiliciently toclear the obstruction, the spring 15 immediately upon the obstructionbeing cleared closing the arms again to their normal positien, and thesprings 16 returning the arms to theirnormal vertical position. Thearms, however, are not liable to be spread by the action of thetrolley-wheel leaving the wire, owing to the fact that in such a easethe trolley-wire when it leaves the wheel strikes one or the other ofthe conical rollers and is immediately returned to the groove in thetrolley-wheel.

IOO

The attachment is constructed of strong,r and durable metal and isapplicable to Various types of harps.

Such changes in the size and minor details of construction as arepermissible by the appended Claims may be `resorted to Without departing from the spirit and scope of the in- Vention.

lVhat We Claim, and desire to secure by Letters Patent, is'

The combination With a trolley-harp having a pin mounted therein, atrolley-Wheel journaled upon said gage a trolley-Wire, of a rearwardextension carried by said harp, a pin journaled in said extension, armspvotally mounted in the ends of said pin, and having their lower ends lconnected together, revoluble cone-shaped rollers carried by the upperends of said arms l and contacting with one another, a retraotal springconnecting said arms together, and means connecting with the pin of saidharp to retain said arms in a Vertical position, substantially asdescribed.

In testimony whereof We afIiX our signatures in the presence of twoWitnesses.

; JOHN STRUTH. l CON-ARD HOLZAPFEL.

pin and adapted to enl Vitnesses: E. E. POTTER,

H. C. EVERT.

